Elbow for wiring conduits



J. A. VQLK; JR ELBOW FOR WIRING connuns Oiiginal Filed Aug. 1, 1922 INVENTOR Q. 12m BY ATTORNEY Q an Jan. 29, 1924.

.rosnrn A. VOLK, an, or NORWALK, QQhTiJECTICUfIA$QIGIiTOB T6 *rfin' veto wire. COM- Pliny, A coaronnrion orTcoNNEbErIcUr.

ELBOW on WIRING countries.

Application filed August 1, 1922, Serial Nof 578,974. Renewed December'18,1923;

To all whom it may concern: Be it known that I, JosEPH A. VOLK, Jr.,

a citizen of the United States, and resident I of N orwalk, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Elbows for Wiring Conduits, of which the following is a specification.

y present invention relates to improvements in elbows for wiring-conduits having an opening through its wall for readily drawing the wires through one conduit to which the elbow is attached and passing them through the other conduit connected by the elbow to the first named conduit,

whereby one and the same elbow is adapted to be used universally in practically any corner or position of the installation with the said opening always accesiflo'le. Also means is provided whereby the screw-holes and the contained screws :t'or fastening the cover over said opening always make the heads of the screws incline away from the adjacent wall, floor or ceiling, etc, so as to be readily accessible to a screw-driver; furthermore, the adaptation is such that the screws cannot contact with or injure the contained wiring.

The drawings show one preferred embodiment of my invention. In them, Fig. l is a side elevation of my improved elbow with the internal structure indicated by dotted lines; Fig. 2 is an end elevation of same looked at from the left inFig. 1; Fig. 3

is a plan view as seen from the top in Fig.' 1; Fig. 4. is a perspective view of the cover detached from the elbow; Fig. 5 is a horizontal section on the line 5-5 in Fig. 1 combined with a plan vie-w of the rest of the elbow; and shows also a conduit screwed into one end of said elbow; Fig. 6 is a vertical section on the line 66 in Fig. 1 combined with an elevational view of the rest of the elbow; and shows also a conduit screwed into the vertical arm of the elbow;-

Fig. 7 is supposed to show in plan the floor and the four walls of a room and illustrates how my elbow fitting (made in one style like Fig. 1, without any right or left) can be used in any corner of the room and yet have the cover-opening to the front with said opening accessible to get at the wires within and also with the screws accessible for attaching and detaching the cover; Figs. 8, 9 and 10 are respectively combined crossuniversally in sectional "and'elevational views on the sectrated by the particular embodiment thereof in, the drawings, 1-1 are the usual electrical wiring-conduits adapted to be connected together y my improved elbow 3;" Theends of-sald elbow are internally. screw-threaded at 4 to .re'ceivethe conduits.

Externally, the ends oftheelbow are preferably formedwithintegral fiatportions -5 adapted to be engaged by a :wrench.

The side of the elbow has an opening through it adapted tobe closed bythe cover 7. Both the elbow with its said opening and also said cover 7 areinpractice molded as separate pieces but for the purpose of describing the position andnature of the openlng and the shape of the cover, the same may be described as havingbeen formed by an inclined cut taken through the side of an ordinary pipe elbow, saidcut beginning on the outside of the elbow near the bend 8 (Fig. 1) and inclining inwardly toward'the duit, but also oneand-the same elbow with said kind of opening is adapted to be used practically any corner or position in the installation with said opening outermost and giving access to the interior of the elbow and'therelated conduits.

How this'is possible is shown in Fig. 7,

showing in plan the floor and the four walls of a roomwith one of my elbows located in-e-ach corner or" the room with its sideopening away from (as distinguished from against) 'thefwall and, therefore fully accessible. In all of the figures, I have designated the same end of the elbow'by the letter A and the opposite end by B. Bynoting these lettered ends of the elbows in Fig. 7 it will be seen how the elbow can be shifted in its position to fit each and every corner and yet still bring its opening to the outside for ready access. Accordingly, no rights and lefts- (meaning two kinds of elbows, one with openings on the left side and the other with openings on the right side) are necessary, the inconvenience and expense of having two or more kinds of elbows being saved threaded endsyof the this purpose are thickened internally by transversely extending integral ribs 11 on the inside of the elbow. These screws are thereby located wholly inside said ribthickened walls and, therefore, cannot injure the insulation of the contained wires;

nor do they obstruct the interior of the elbow except to the slight immaterial extent equal to the thickness of said ribs.

Furthermore, it will be noted from the various figures that said screw-holes are tapped in said walls in directions such that in whatever corner the elbow may be located, each of the two screws inclines from its point to its head away from the adjacent wall, floor or other surface. This makes it easy to use a screw-driver to attach or de tach the cover when the elbow is located in a corner.

In short, my improvements in elbow fitings give same decided advantages. Some of said improvements may be used without others. Also, changes and modifications may be made in the practical embodiments of my present improvements which will, nevertheless, still be within the spirit of the foregoing description and within the meaning and spirit of the annexed claims and which as such are accordingly intended to be covered thereby.

What I claim is:

1. An elbow for connecting wiring-com duits having an opening through its side for access to its interior, the plane of the mouth of said opening beginning on the outside of the elbow near the bend and inclining inwardly towards the point of the elbow.

2. An elbow for connecting wiring-conduits having an opening through its side for access to its interior, the plane of the mouth of said opening beginning on the outside of the elbow near the end and inclining inwardly towards the point of the elbow; and a detachable cover for said opening.

3. An elbow for connecting wiring-com duits having an opening through its side for access to its interior, the plane of the mouth of said opening beginning on the outside of the elbow nearthe bend and inclining inwardly towards the point of the elbow; a cover for said opening; and means for fastening said cover to the elbow comprising a transversely extending integral rib on the inside of the elbow, said rib being lengthwise tapped with screw threads adapted to be engaged byva screw for fastening the cover to the elbow.'

4. An elbow for connecting wiring-conduits having an opening through its side for access to its interior, the plane of the mouth of said opening beginning on the outside of the elbow near thebend and inclining inwardly towards the point of the elbow; a cover for said opening; and means for fastening said cover to the elbow comprising a screw-threaded opening tapped substantially tangentially in the wall of the elbow adapted to be engaged by a screw for fastening the cover to the elbow.

5. An elbow for connecting wiring-conduits having an opening through its side for access to its interior; a cover for said opening; and means for fastening said cover to the elbow comprising a screw-threaded opening tapped substantially tangentially in the wall of the elbow in a direction such that said opening inclines from its inner to its outer end away from the adjacent wall or surface of a corner in which the elbow may be located with its aforesaid side-opening disposed accessibly outward.

6. An elbow for connecting wiring-con-- duits having an opening through its side for access to its interior; a cover for said opening; and means for fastening said cover to the elbow comprising a transversely extending integral rib on the inside of the elbow, said rib being lengthwise tapped with screwthreads adapted to be engaged'by a screw for fastening the cover to the elbow.

7. An elbow for connecting wiring-conduits having an opening through its side for access to its interior; a cover for said opening; and means for fastening said cover to the elbow comprising a substantially tangential opening in the wall of the elbow in a direction such that said opening inclines from its inner to its outer end away from the adjacent wall or surface of a corner in which the elbow may be located with its aforesaid side-opening disposed accessibly outward; and means received into said opening for fastening said cover.

Signed at New York in the county of New York and State of New York this 31st day of July A. D. 1922.

JOSEPH A. VOLK, JR.

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